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<p>Reports docstrings that do not adhere to the triple double-quoted string format.</p>
<p><b>Example:</b></p>
<pre><code>
def calc(self, balance=0):
    'param: balance'
    self.balance = balance
</code></pre>
<p>When the quick-fix is applied, the code changes to:</p>
<pre><code>
def calc(self, balance=0):
    """param: balance"""
    self.balance = balance
</code></pre>
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